Automatic steam and hot-water safety-cock.



J A. FREY. AUTOMATIC STEAM AND HOT WATER SAFETY COOK.

APPLICATION FILED FEB.13,1906.

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4 TTOHNE Y8 PATENTED FEB. 5, 1907.

JOHN A. FREY, OF WASHINGTON, I DISTRICT OF COLUMRLA.-

AUTOMATIC STEAM AND HOT-:WATER' SAFETY OOCK.

Specification of Letters Patent.

Patented Feb. 5, 1907.

Application filed February 1 3, 1906. Serial No: 300.8%.

To (all whom, it ntay concern:

Be it knownthat 1, JOHN A. FREY, a citizen of the United States, and aresident of Washington, in the District of Columbia, have inventedcertain new and useful Improvements in Automatic Steam and HotlaterSafety-Cocks, of which the following is a specification.

My invention is a cook or faucet for use as an attachment of domesticwater-heaters and steam boilers or generators of various descriptionsfor relieving pressure of steam when it exceeds a predetermined limit ofsafety.

The device is adapted for use in the usual Wvay for discharge of waterfrom a heater or spigot being set in the position to close the! usualdischarge-passage, .Fig. 3 is mainl a similar section, thespring-pressed va ve which constitutes the chief feature of theautomatic attachment being shown raisedto allow escape of steam or waterwhen thepressure exceeds ,the safety limit. Fig. 4 is a perspective viewof the body of the faucetplug or spigot.

My invention is applied to a cook or faucet having the usual pipeor'body with a central dischargeopening a and a rotatable tapered plugor spi 0t 1), having a transverse aperture 1), which w hen the plug isadjusted with said aperture alined with the passage a allowsdischarge ofthe contents of the heater or boiler to which the cook or faucet may beapplied.

The automatic safety attachment is constructed as follows: I provide asupplemental escape or discharge passage comprising the vertical portion0, the portion 0 formed in the upper portion or swell a, and a con-'necting-passagc 0 extending transversely through the plug 1).Communication-between the passage 0 and the portion 0 c is normally cutoil' by a valve (Z, which seats downward, as shown, in Fig. 2, the samebeing held elastically on its seat by means of a spiral spring e, thatencircles the stem or;

shank of the valve and extends upward the casing a forming a verticalintegral-cits; tension of the body or pipe of the faucet. A screw-cap ais screwed on the extension of, and a set-screw f passes through thesame vertically and bears upon a washer g, that rests on the top of thespring e. A jam-nut h is applied to the screw f and performs the usualfunction of locking the latter. It is apparent that by adjustment ofthe, screw f the compression of the spring may be varied,

and thus the pressure upon the valve cor-, respondingly regulatedaccording to the conditions. In other words, the valve d will be set toopen automatically by the pressure of water or steam in the passage 0whensuch pressure exceeds a predetermined .imit

of safety. It will be seen that the valvethus governs automatically thedischarge of steam or water through the 'by-pass or supplemental passage0 cc. Fig, 3 illustrates the position of the valve when raised byexcessive -pressure of steam or water, the latter then dischargingthrough the supplemental passage, as indicated by arrows It will beobserved that inthis case the plug or spigot b occupies the sameposition as when normally closing the usual ormain dischargepassage a.If the plug or spigot b be turned a quarter round, it is apparent thatthe supplemental escape or discharge passage will be cutoff and freedischarge through the passage a permitted by reason of the fact that theaperture 1) of the plug or spigot will then be in alineme with suchpassage 0. I thus provide a common-form of cook or faucet with anattachment of simple and inexpensive construction, which is adapted,

dispensing with the necessity of providing a 'spccialsafetyvalve-constituting a usual at ta'chment of water-heaters,steam-boilers &c

In order to indicate visually the degree of g compression of the spring6 the head of the.

. supplemental escape or, discharge passage provided in the upperportion of the pipe and to .act'as an automatic safety discharge, thusrec ljextenaing from a point in rear of the a point in front of thesame,

gnor'mallyclosing the same, the plug having a Y transverse bore arrangedat right angles to z-" the; usul-discharge-aperture therein and}.sagesubtantially as described. "-10 "D T LLMAE CDPY plug to 1 mentaltransverse bore at right angles to the and a springmaindischargeaperture, and a supple- 15 I mental discharge passagecommunicating with such bore and with the main passage of the faucet inrear of the plug, and a springpressed valve normally seated in the rearportion of the passage, substantially as de- 2 scribed.

pressed valve seated in such passage and adapted' he'n the plug isclosed to register with other portions of the supplemental pas- 2. The.improved cock or faucet for the i H FREY' vWVitnesses:

purpose specified comprising the usual pipe I or,.body,an'd ,a rotatableepertured plug, said I SOLON C KEMoN,

filug having its upper portion a supple- AMos W. HART.

